Erie Meyer, 29, Aminatou Sow, 28

Cofounders, Tech LadyMafiaTired of the constant refrain that there are no women in technology, Meyer and Sow founded the Tech LadyMafia, a list-serv and membership group for women in tech to talk about their accomplishments, brain storm on projects, exchange tips, and importantly, prove that they exist. It includes more than 750 women, living everywhere from California to China. Sow is also the New York-based digital engagement director for IAVA, an org that supports veterans and Meyer is a senior advisor to the White House's Chief Technology Officer in D.C.